What is the state fossil of New Jersey?

The state fossil of New Jersey is the Hadrosaurus foulkii. This dinosaur, a species of duck-billed herbivorous dinosaur, was discovered in Haddonfield, New Jersey, in 1858 and is one of the first nearly complete dinosaur skeletons ever found in North America. The Hadrosaurus lived around 75 million years ago during the Late Cretaceous period. The fossil has provided key insights into dinosaur anatomy and behavior. The Hadrosaurus foulkii was designated as New Jersey’s state fossil in 1991 to highlight the state’s historical contributions to paleontology and its fossil-rich landscapes.